Spikes in data collected with rpi3

Development 🇬🇧 Development Projects with Ruuvi products
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I did some digging around and ended up here. I dropped the bluetooth uart speed to half, and it worked for me, e.g. no bluetooth errors in dmesg output in the last eight hours, and the spikes have gone from Grafana.

$ sudo -i
# cp -pi /usr/bin/btuart /usr/bin/btuart.orig
# sed -e 's/921600/460800/g' < /usr/bin/btuart.orig > /usr/bin/btuart
# diff -u /usr/bin/btuart.orig /usr/bin/btuart
--- /usr/bin/btuart.orig        2018-10-29 14:02:08.000000000 +0200
+++ /usr/bin/btuart     2019-08-09 22:12:36.026493166 +0300
@@ -15,7 +15,7 @@
        if [ "$uart0_pins" = "16" ] ; then
                $HCIATTACH /dev/serial1 bcm43xx 3000000 flow - $BDADDR
        else
-               $HCIATTACH /dev/serial1 bcm43xx 921600 noflow - $BDADDR
+               $HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR
        fi
 else
        $HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR
# shutdown -r now
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